diff --git a/cd.sh b/cd.sh
index f562f1b..a1b2398 100644
--- a/cd.sh
+++ b/cd.sh
@@ -106,6 +106,10 @@ cd_set_environment_variables () {
             CD_CA_ROOT="/etc/pki/ca-trust/source/anchors"
             CD_CMD_CA="update-ca-trust"
         ;;
+        "${CD_OS_ARCH}")
+            CD_CA_ROOT="/etc/ca-certificates/trust-source/anchors"
+            CD_CMD_CA="update-ca-trust"
+        ;;
         "${CD_OS_ALPINE}"|"${CD_OS_DEBIAN}"|"${CD_OS_UBUNTU}")
             CD_CA_ROOT="/usr/local/share/ca-certificates"
             CD_CMD_CA="update-ca-certificates"
@@ -148,6 +152,19 @@ skip_if_unavailable=False
             CD_PM_HTTPS_PATH="/etc/apk/repositories.d/https"
             CD_PM_HTTPS_TEXT="--no-verify"
         ;;
+        "${CD_OS_ARCH}")
+            CD_CMD_CLEAN="pacman --sync --clean --noconfirm"
+            CD_CMD_INSTALL="pacman --sync --noconfirm"
+            CD_CMD_QUERY="pacman --query"
+            CD_CMD_UPDATE="pacman --sync --refresh"
+            CD_CMD_UPGRADE="pacman --sync --sysupgrade --noconfirm"
+            # TODO
+            CD_PKG_PKG=""
+            CD_PM_CONF_PATH=""
+            CD_PM_CONF_TEXT=""
+            # TODO
+            # TODO
+        ;;
         "${CD_OS_DEBIAN}"|"${CD_OS_UBUNTU}")
             CD_CMD_CLEAN="apt-get clean"
             CD_CMD_INSTALL="apt-get install --assume-yes"
@@ -226,6 +243,11 @@ Dir::Etc::SourceParts \"\";
             CD_PYTHON_PACKAGE="python3"
             CD_PYTHON_PACKAGES="/usr/lib/python3.11/site-packages"
         ;;
+        "${CD_OS_ARCH}")
+            CD_PYTHON_COMMAND="python3.12"
+            CD_PYTHON_PACKAGE="python"
+            CD_PYTHON_PACKAGES="/usr/lib/python3.12/site-packages"
+        ;;
         "${CD_OS_DEBIAN}")
             case "${CD_OS_VERSION}" in
                 "bookworm") CD_PYTHON_COMMAND="python3.11" ;;
diff --git a/readme.md b/readme.md
index 2d9139c..f9d0d44 100644
--- a/readme.md
+++ b/readme.md
@@ -5,31 +5,36 @@ from various CA, CI, OCI / OS.
 
 ## Features
 
-* [ ] support
-    * [X] package repositories mirror
-      * [X] custom CA certificates
-      * [X] known CA certificates
-    * [ ] Operating Systems
-      * [X] Alma
-        * [X] 8
-        * [X] 9
-      * [X] Alpine
-        * [X] 3.18
-        * [X] 3.19
-      * [ ] Arch
-      * [X] Debian
-        * [X] Bookworm
-        * [X] Bullseye
-      * [X] Rocky
-        * [X] 8
-        * [X] 9
-      * [X] Ubuntu
-        * [X] Mantic
-        * [X] Noble
-    * [ ] Continuous Integration platforms
-      * [X] GitHub → Gitea → ForgeJo
-      * [X] GitLab
-      * [ ] SourceHut
+* [X] CA certificates
+  * [X] custom
+  * [X] known
+* [ ] Continuous Integration platforms
+  * [X] GitHub → Gitea → ForgeJo
+  * [X] GitLab
+  * [ ] SourceHut
+* [ ] Operating Systems
+  * [X] Alma
+    * [X] 8
+    * [X] 9
+  * [X] Alpine
+    * [X] 3.18
+    * [X] 3.19
+  * [ ] Arch
+    * [ ] 20231112
+    * [ ] 20240101
+  * [X] Debian
+    * [X] Bookworm
+    * [X] Bullseye
+  * [X] Rocky
+    * [X] 8
+    * [X] 9
+  * [X] Ubuntu
+    * [X] Mantic
+    * [X] Noble
+* [X] Python
+  * [X] 3.9 (Debian Bullseye)
+  * [X] 3.11 (Alma, Alpine, Debian Bookworm, Rocky, Ubuntu Mantic)
+  * [X] 3.12 (Arch, Ubuntu Noble)
 
 ## How
 
@@ -39,6 +44,7 @@ from various CA, CI, OCI / OS.
 | CD_DNS        | Space separated servers |
 | CD_URL_ALMA   | Alma repository URL     |
 | CD_URL_ALPINE | Alpine repository URL   |
+| CD_URL_ARCH   | Arch repository URL     |
 | CD_URL_DEBIAN | Debian repository URL   |
 | CD_URL_ROCKY  | Rocky repository URL    |
 | CD_URL_UBUNTU | Ubuntu repository URL   |